Gliese 687 information

Gliese 687
	; Gliese 687 is the small orange star located in the center of the above image.
Observation data; Epoch J2000 Equinox J2000
Constellation	Draco
Right ascension	17h 36m 25.89931s
Declination	+68° 20′ 20.9096″
Apparent magnitude (V)	9.15
Characteristics
Spectral type	M3.5 V
U−B color index	1.06
B−V color index	1.49
Astrometry
Radial velocity (Rv)	−28.90±0.13 km/s
Proper motion (μ)	RA: –320.675 mas/yr ; Dec.: –1269.893 mas/yr
Parallax (π)	219.7898 ± 0.0210 mas
Distance	14.839 ± 0.001 ly ; (4.5498 ± 0.0004 pc)
Absolute magnitude (MV)	10.87
Details
Mass	0.40±0.02 M☉
Radius	0.4183±0.0070 R☉
Luminosity	0.02128±0.00023 L☉
Surface gravity (log g)	4.66 cgs
Temperature	3,413±28 K
Metallicity [Fe/H]	+0.11 ± 0.20 dex
Rotation	61.8±1.0 d
Rotational velocity (v sin i)	<2.8 km/s
Other designations
	BD+68 946, GJ 687, HIP 86162, SAO 17568, LHS 450, LTT 15232, PLX 4029.00
Database references
SIMBAD	data
	Gliese 687 Location of Gliese 687 in the constellation Draco;

Gliese 687, or GJ 687 (Gliese–Jahreiß 687) is a red dwarf in the constellation Draco. This is one of the closest stars to the Sun and lies at a distance of 14.84 light-years (4.55 parsecs). Even though it is close by, it has an apparent magnitude of about 9, so it can only be seen through a moderately sized telescope. Gliese 687 has a high proper motion, advancing 1.304 arcseconds per year across the sky. It has a net relative velocity of about 39 km/s.^[2] It is known to have a Neptune-mass planet.^[7] Old books and articles refer to it as Argelander Oeltzen 17415.^[9]

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^ ^a ^b ^c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
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^ ^a ^b Cite error: The named reference 687b-discovery was invoked but never defined (see the help page).
^ Cite error: The named reference apj704_2_975 was invoked but never defined (see the help page).
^ Cite error: The named reference Oeltzen17415 was invoked but never defined (see the help page).

[GaiaDR3-1] Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).

[SIMBAD-2] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[apj649_1_436-3] Cite error: The named reference apj649_1_436 was invoked but never defined (see the help page).

[Feng2020-4] Cite error: The named reference Feng2020 was invoked but never defined (see the help page).

[Boyajianvon_Braun2012-5] Cite error: The named reference Boyajianvon Braun2012 was invoked but never defined (see the help page).

[apj644-6] Cite error: The named reference apj644 was invoked but never defined (see the help page).

[687b-discovery-7] Cite error: The named reference 687b-discovery was invoked but never defined (see the help page).

[apj704_2_975-8] Cite error: The named reference apj704_2_975 was invoked but never defined (see the help page).

[Oeltzen17415-9] Cite error: The named reference Oeltzen17415 was invoked but never defined (see the help page).

Observation data Epoch J2000 Equinox J2000
Gliese 687 is the small orange star located in the center of the above image.
Constellation	Draco
Right ascension	17^h 36^m 25.89931^s^[1]
Declination	+68° 20′ 20.9096″^[1]
Apparent magnitude (V)	9.15^[2]
Characteristics
Spectral type	M3.5 V^[3]
U−B color index	1.06
B−V color index	1.49
Astrometry

Radial velocity (R_v)	−28.90±0.13^[1] km/s
Proper motion (μ)	RA: –320.675 mas/yr^[1] Dec.: –1269.893 mas/yr^[1]
Parallax (π)	219.7898 ± 0.0210 mas^[1]
Distance	14.839 ± 0.001 ly (4.5498 ± 0.0004 pc)
Absolute magnitude (M_V)	10.87

Details

Mass	0.40±0.02^[4] `M`_☉
Radius	0.4183±0.0070^[5] `R`_☉
Luminosity	0.02128±0.00023^[5] `L`_☉
Surface gravity (log g)	4.66^[6] cgs
Temperature	3,413±28^[5] K
Metallicity [Fe/H]	+0.11 ± 0.20^[6] dex
Rotation	61.8±1.0 d^[7]
Rotational velocity (v sin i)	<2.8^[8] km/s

Other designations
BD+68 946, GJ 687, HIP 86162, SAO 17568, LHS 450, LTT 15232, PLX 4029.00^[2]
Database references
SIMBAD	data
Gliese 687 Location of Gliese 687 in the constellation Draco

Gliese 687 information

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